public class Circular{
	Circle bottom;
	double height;
	void setBottom(Circle c){
		bottom =c;
	}
	void setHeight(double h){
		height=h;
	}
	double getVolme(){
		if(bottom == null)
		 	return -1;
		else
			return bottom.getArea()*height/3.0;
	}
	double getBottomRadius(){
		return bottom.getRadius();
	}
	public void setBottomRadius(double r){
		bottom.setRadius(r);
	}
}